Answer:
In order for the powder to dissolve, each powder molecule must separate from the other powder molecules and be surrounded by water molecules. This shift in arrangement either absorbs or releases energy depending on the situation. It is due to the exchange of energy that the temperature of the solution fluctuates.
Explanation:
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by radiation from the Earth's surface
Answer: it honestly depends.
Explanation:
Ionic compounds. because when in solid form they are held firmly in place therefore they cannot move to conduct electric current.
